Wireless or space telegraphy.



No. 657,222. Patented Sept. 4,1900. 1. KITSEE.

WIRELESS 0R SPACE TELEGRAPHY.

(Application filed May 20, 1899. Renewed Mar. 12, 1900.)

(N o M o d e I W itnesses- Inventor.

Ma W? I m: uunms PEYEHS co mom-Llmm'wnsnmcwu, o c

STATES PATENT OFFICE.

ISIDOR KITSEE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO CHARLES E.WILSON, OF SAME PLACE.

WIRELESS OR SPACE TELEGRAPHY.

SPECIFICATION formingpart of Letters Patent No. 657,222, dated September4, 1900.

Application filed May 20, 1899. Renewed March 12, 1900. Serial No.8,399. (No model.)

To ctZZ whom it may concern:

Be it known that I, ISIDOR KITsEE, of the city and county ofPhiladelphia, State of Pennsylvania, have invented certain new anduseful Improvements in lVireless or Space Telegraphy, of whichthe'followingisaspecification.

My invention relates to telegraphy,aud has more special reference towireless or space IO telegraphy.

The object of my invention is to record the messages with the aid ofchemically-prepared paper.

In telegraphy with the aid of a continuous circuit the metallic drum onwhich the chemically-prepared paper rests is in electrical connectionwith the ground, and the conducting-stylus resting on the paper is inelectrical connection with the line from which the messages are sent.Both, line as well as ground connection, are therefore electricallyconnected with each other through the interposition of the moistchemical paper. This electric contact is a necessity,and the recorderwould not work if between the stylus and the paper a non-conductingmaterial or dielectricsuch, for instance, as mica,glass,orair isinterposed. In my experiments with spacetelegraphy I endeavored to makeuse of this chemical recorder in the usual manner; but no matter how faror near the sending-station was placed from the receiving-station theairtransmitted electrical impulses would not leave any trace on thepaper if the stylus were 5 broughtinto electrical connection withthepaper resting on the conducting-drum connected to the ground. Aftertesting different arrangements I found that it was necessary tointroduce an air-gap'and allow the current to 40 discharge through sameeither in the form of a spark or silent discharge. I thereforeconstructed a device with the following arrangement: On the drum proper,which, as usual, is connected with the ground, was placed thechemically-prepared paper; but the stylus was replaced by an adjustablescrew, the point of which was at a distance of about two millimetersfrom the paper. Un-

der this condition the apparatus worked satisfactorily. As a fluid I usepotassium iodid, potassium bromid, dextrine, and Water in the proportionof one part of the dextrine, eight parts of iodid, thirty-two parts ofbromid, and about one hundred and twenty parts of water; but otherproportions and other liquids 5 5 may be used.

Referring to the drawings, Figure l is a diagrammatic view illustratingthe electrical connection of the device. Fig. 2 is a plan View of thetape after it has passed through the device, showing theindication-marks P, H, I, L, A.

A is the drum or Wheel carrying the paper B. This drum or wheel is,through the arm C and wire 0, connected to the ground D. In proximity tothe paper B is the adjustable screw E, provided with the point 6,connected through the wire F with the aerial terminal F.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In space telegraphy a receiving instrument consisting of achemically-prepared paper resting on a metallic support connected to.the ground in combination with the terminal of the aerial conductorsecured in juxtaposition to, but not in actual contact with, said paper,and means for carrying successively, successive parts of said paperbetween said support and aerial conductor.

2. In telegraphy a receiving instrument consisting of achemically-prepared paper in electrical contact with one terminal of thereceiving-circuit, the other terminal of the receiving-circuit beingseparated from said chemically-prepared paper by the interposition of anon-conducting body, one terminal of the receiving-circuit beingconnected to the air-line and the other terminal of thereceiving-circuit-being connected to the ground. 0

3. Areceiving instrument forcurrent-waves of high intensity consistingof a chemicallyprepared paper and metallic support connected to oneterminal of the receiving-circuit, an adjustable screw connected to theother terminal of the receivingcircuit and means for carrying the paperbetween said support and screw, said paper being in contact only withone terminal ,of said circuit,

the terminals being connected, one to the aerial conductor and oneto theground.

In testimony whereof I sign my name,in the presence of two subscribingwitnesses, this 19th day of May, A. D. 1899.

ISIDOR KITSEE.

Witnesses:

WALLAcE B. ELDRIDGE, E. R. STILLEY.

